Grundfos CR 32 Service Instructions Manual
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Grundfos CR 32 Service Instructions Manual

Model a 50/60 hz
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See also: Service Manual , Instruction Manual
1.
Type identification ........................................................................................................................... 2
1.1
Nameplate CR, CRN ........................................................................................................................................... 2
1.2
Type key .............................................................................................................................................................. 3
1.3
Codes used.......................................................................................................................................................... 3
2.
Tightening torques and lubricants................................................................................................. 4
3.
Service tools .................................................................................................................................... 5
3.1
Special tools ........................................................................................................................................................ 5
3.2
Standard tools...................................................................................................................................................... 6
3.3
Torque tools......................................................................................................................................................... 6
4.
Dismantling and assembly ............................................................................................................. 7
4.1
General information ............................................................................................................................................. 7
4.2
Replacement of motor ......................................................................................................................................... 8
4.3
Replacement of motor stool................................................................................................................................. 9
4.4
Replacement of coupling ..................................................................................................................................... 9
4.5
Replacement of shaft seal ................................................................................................................................. 10
4.6
Replacement of basic unit ................................................................................................................................. 11
4.7
Replacement of chamber stack ......................................................................................................................... 12
4.8
Dismantling of chamber stack............................................................................................................................ 13
4.9
Assembly of chamber stack............................................................................................................................... 15
5.
Order of assembly for chambers and impellers ......................................................................... 17
5.1
CR(N) 32............................................................................................................................................................ 17
5.2
CR(N) 45............................................................................................................................................................ 18
5.3
CR(N) 64............................................................................................................................................................ 19
5.4
CR(N) 90............................................................................................................................................................ 20
GB
96547183 0407
Service instructions
CR(N) 32, 45, 64 and 90
Model A
50/60 Hz
3~
1 / 20

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Summary of Contents for Grundfos CR 32

  • Page 1: Table Of Contents

    Service instructions CR(N) 32, 45, 64 and 90 Model A 50/60 Hz Type identification ........................... 2 Nameplate CR, CRN ............................2 Type key ................................3 Codes used................................3 Tightening torques and lubricants....................4 Service tools ............................ 5 Special tools ................................ 5 Standard tools..............................

  • Page 2: Type Identification

    1. Type identification This section shows the type key, the nameplate and the codes that can appear in the variant code. Note: As codes can be combined, a code position may contain more than one code (letter). 1.1 Nameplate CR, CRN Pos.

  • Page 3: Type Key

    1.2 Type key Example 64 - XXXX Type range Rated flow rate in m³/h Number of stages Number of reduced-diameter impellers Code for pump version a) Code for pipe connection b) Code for pump materials c) Code for rubber components in pump d) Code for shaft seal e) 1.3 Codes used Note...

  • Page 4: Tightening Torques And Lubricants

    2. Tightening torques and lubricants Pos. Description Dim. Torque [Nm] Lubricant Hexagon socket head screw M10 x 25 THREAD-EZE Air vent screw 5/20 Gardolube L 6034 Plug 1/2” THREAD-EZE Hexagon socket head screw M8 x 30 Gardolube L 6034 Hexagon socket head screw M10 x 50 THREAD-EZE M8 x 20...

  • Page 5: Service Tools

    3. Service tools 3.1 Special tools Pos. Description For pos. Suppl. information Part no. CR(N) 32 ~ SV0003-3 CR(N) 45 ~ SV0003-4 Holder with pin for dismantling and assembly SV0003 CR(N) 64 ~ SV0003-5 CR(N) 90 ~ SV0003-2 Punch 6g-47-47c-47d-47e SV0015 CR(N) 32 SV0043...

  • Page 6: Standard Tools

    3.2 Standard tools Pos. Description For pos. Suppl. information Part no. 105 (113) 3 mm SV0153 M6 - 5 mm SV0124 Tee key 26b-67 M8 - 6 mm SV0050 9-58a M10 - 8 mm SV0051 28-58a M10 - 8 mm ID1205 Hexagon socket head screw key 5/8”...

  • Page 7: Dismantling And Assembly

    4. Dismantling and assembly 4.1 General information The Grundfos centrifugal pumps, type CR(N) 32, 45, 64 and 90 are multistage in-line pumps. If the pump is choked or damaged, please follow the instructions below. Position numbers, see "Parts list” and 3.

  • Page 8: Replacement Of Motor

    4.2 Replacement of motor 4.2.1 Dismantling Slacken the screws, (pos. 7a), and remove them together with the coupling guards, (pos. 7). Keep the shaft seal in position on the shaft by inserting the distance piece, (pos. H), between the shaft seal, (pos. 105), and the seal carrier, (pos.

  • Page 9: Replacement Of Motor Stool

    4.3 Replacement of motor stool 4.3.1 Dismantling Slacken the screws, (pos. 7a), and remove them together with the coupling guards, (pos. 7). Keep the shaft seal in position on the shaft by inserting the distance piece, (pos. H), between the shaft seal, (pos. 105), and the seal carrier, (pos.

  • Page 10: Replacement Of Shaft Seal

    4.5 Replacement of shaft seal 4.5.1 Dismantling To enable replacement of shaft seal, motors up to and including 7.5 kW/10.0 HP must be removed; motors larger than 7.5 kW need not be removed. Slacken the screws, (pos. 7a), and remove them together with the coupling guards, (pos. 7). Slacken the screws, (pos.

  • Page 11: Replacement Of Basic Unit

    4.6 Replacement of basic unit 4.6.1 Dismantling Slacken the screws, (pos. 7a), and remove them together with the coupling guards, (pos. 7). Slacken the screws, (pos. 9), and remove them together with the coupling, (pos. 8). Slacken and remove the screws, (pos. 28). Carefully lift the motor and the motor stool, (pos.

  • Page 12: Replacement Of Chamber Stack

    4.7 Replacement of chamber stack 4.7.1 Dismantling Remove the basic unit. See 4.6 Replacement of basic unit. Slacken the nuts, (pos. 36), and remove them together with the washers, (pos. 66a). Knock the pump head, (pos. 2a), free of the outer sleeve, (pos. 55), by means of a rubber mallet. Remove the pump head and the outer sleeve.

  • Page 13: Dismantling Of Chamber Stack

    4.8 Dismantling of chamber stack Place the holder for dismantling and assembly, (pos. A), in a vice and tighten it. Make sure that the ring fitting the inlet part, (pos. 44), is placed in the holder. See 3. Service tools. When dismantling the chamber stack, use the holder hole marked "Dismantling".
  • Page 14 Impeller (pos. 49/49a) and neck ring complete (pos. 45a) If the tolerance (clearance) between the impeller (wear ring, (pos. 49c)) and the neck ring, (pos. 45), is too big, replace the worn part(s). Impeller (wear ring (pos. 49c)) If the wear ring is worn or deformed, remove it by pushing it up and free of the impeller using the holder, (pos. C), and the puller, (pos.

  • Page 15: Assembly Of Chamber Stack

    4.9 Assembly of chamber stack Before assembly, clean and check all parts. Parts that are defective or do not comply with the above measurements due to wear should be replaced by new parts. Impeller (pos. 49 and 49a) Press the wear ring, (pos. 49c), carefully down over the impeller skirt. Make sure to push the ring straight down and home against the impeller skirt and take care not to damage the impeller.
  • Page 16 Continue the assembly as follows: Symbols refer to 5. Order of assembly for chambers and impellers. Fit the impeller and the split cone, (pos. 49b). Press the impeller home, and knock the split cone into the impeller hub using the key, (pos. I). Hold the impeller with the hook spanner, (pos.

  • Page 17: Order Of Assembly For Chambers And Impellers

    5. Order of assembly for chambers and impellers 5.1 CR(N) 32 The assembly of the pump is illustrated in the table by symbols. CR(N) 32 10-2 11-2 12-2 13-2 14-2 CR(N) 32 17 / 20...
  • Page 18 5.2 CR(N) 45 The assembly of the pump is illustrated in the table by symbols CR(N) 45 10-2 11-2 12-2 13-2 (N) 45 18 / 20...
  • Page 19 5.3 CR(N) 64 The assembly of the pump is illustrated in the table by symbols CR(N) 64 CR(N) 64 19 / 20...

  • Page 20: Cr(N) 90

    5.4 CR(N) 90 The assembly of the pump is illustrated in the table by symbols CR(N) 90 CR(N) 90 20 / 20...

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